Associated to this curve is a unique genus two compact Riemann surface, see section VII of [1]} for more details, which we denote by \(X_{\bf {z}}\) . For any Riemann surface \(X_{\bf {z}}\) , we have the associated moduli space \(\mathcal {M}^B_{X_{\bf {z}}}\)  of semistable vector bundles of rank two with trivial determinant on \(X_{\bf {z}}\) , defined in (REF ). From [2]} section 2.5, it follows that there exists a proper holomorphic submersion,
\(p\colon \mathcal {M} \rightarrow \mathcal {C}_{\infty },\) 
